Journal-bearing for emery grinding-machines



(N0 Modelfl G. G. .OROWELL. I JOURNAL BEARING FOR EMERY GRINDINGMAGEHI'NJB S. No. 441,139;

Patented-Nov. 25, 1 890.

lLllLlLLLLlLlllIllIIl/Il WIN/E3358.

Y A-TfOli/VEY.

citizen of the United States, residing at Cin To all whom, it mayconcern.-

UNITED STATES Gnoner: o. onowicnn, or (liYClNNA'lL onto.

JOUIRNAL-BEARING'FOR EMERY GRINDING-,MACHINE'S.

I SPECIFICATION forming part of Letters Patent No. 441,139,datedNovember 25,1890.

Application filed September 25,1889. Serial No. 327,084. (llo morleh IBe it known that I, GEoRoE'G. CRoWELL, a

cinnati, in the county of Hamilton and State of Ohio, have invented acertain newiand, useful Improvement in J our'nal-Bearings for EmeryGrinding-lllachines, of which the-following is a specification.

-My invention relates to the improvement of that class of emery grindingor, buffing machineswherein one or morelemery or bufi-' ingwheels aremounted upon a shaft supported from a suitable frame and has particularrelation to the means of supporting said shaft.

.Heretoforeit has been. customary to support the grinding-whel-carryirigshaft in bearing-boxesupon theupper ends of rigid arms, which extendupwardly from the frame top or bed-plate. This method of holding orsupporting the shaft has features which in some classes -of work areobjectionable for nstancefln case the wheel should be of suchunequal-density'as to throw it out of running balance fromtheinequ'ality in weight or from'the wearing away of the-softer portionsof the wheel, or from other causes. 1 In case these imperfections existand the ordi nary rigid support for the shaft is used, manyimperfections in the work will result, among surface on the articleground.

The objects of myinvention are to which will be the production of anuntrue overcome these imperfections, as will be herein-p after'fully setforth.

' "Referring to the drawings, forming a part -of this specification,Figure '1 is a view in perspectiveof an emery grinding-machine, and Fig.'2 1s a view in cross-section of the wheel-shaft, showing theshaft-support in ele-. vati'on.

- Similarletters refer to similar parts through:

out the several views.

My invention consists of volute springs arranged'in the mannerhereinafter specified to form supports for the wheel-shaft.

The main frame of the machineconsists, as usual, of a suitable bedplatea, and legs I).

manner with slots 0, which are formed therein in 'lines parallel withthe sides and ends;

(I re presents the gri riding-wheel shaft ,which is supportedlongitudinally above the bed;

plate and which carries in the usual manner one or more emery-wheels e.The shaft d at points on opposite sides of its center bears and runs insuitable metallic bearing-boxes f, which may be of the usual form. ,Eachof these boxes is connectedby bolts with one.

end of a volute spring The remaining and lower end of the volute springis connect ed With-the upper side of the bed-plate. This latterconnect-ion is preferably made by bolts :i,'1nade to pass through alongitudinal slot- 70,. formed in the lower inturned end of tho spring.The heads of these bolts serve to bind-the spring firmly against thebed-plate.

The usual rigid shaft-supporting standards are omitted from the machineand the volute springs above described allowed to support, as shown, theshaft and its wheels, The tension of these springs is such as tonormally hold the shaft in correct horizontal alignment-with thebed-plate.

" The usual form of adjustable rests-for the support of the work to beground orpolished may be used in connection with the machine,

the rests; consisting of standards having in, turned feet and pins orbolts extending downwardly from "said feet through the bed-plate slot'c.I v

, In 'orderto equalize thespring-power' of ening ribs thereon. I

The spring-power of the supports may be varied by setting the. bolts 2'at different points in theslot 70.

The herein-described volut-e spring not *only serves as a support forthe shaft-boxes,

but permits the shaft and boxesto vibrate sufficiently to equalize theforce evolved by the emery or bad wheel in motion, causing said wheelsand theirshaft to run on their centers of gravity andat the same timeafford a milder resistance to the'force applied in grinding or buffingvarious articles; The spring character given by the volute springs tothe shaft and the wheels thereon will result in the same degree ofresistance offered. bythe wheel regardless of the angle or pointthe'supports throughout their length, I may, i .if found necessary,thicken the lower portion of the springs or form strengthening orstifion the periphery of said wheels at which said force is applied.

Another object attained by the use of the springhercin shown and.described lies in the fact that in case one side of the wheel is beingused or subjected ,topressure the same resistance is offered at anypoint on said wheel side equidistant from any point on the periphery. Itis obvious, however, that this result might be obtained by surroundingthe shaft with coiled springs and allowing the same to form lateralbearings for the wheels,

or by other similar means.

I am aware of Patent No. 387,238, in which .volute springs are used tosuspend shafting, and therefore'do not claim, broadly, thisconstruction.

Having now fully described my invention,

what I claim, and desire to secure by Letters Patent, is- Injournal-bearings for emery grinding-machines, a frame, and awheel-carrying shaft above said frame, volute springs rising from saidframe, said springs supporting the shaft, as described, and having slotsin their lower end portions, and 'bolts passing through said slots andconnecting the springs and frame, substantialiy as described.

GEO. G. CRQWELL.

y In presence of v BARTON GRIFFITH,

JOHN FRAVEL.

